The Association Between Different Night Shiftwork Factors and Breast Cancer: a Case–Control Study
Access Status
Authors
Date
2013Type
Metadata
Show full item recordCitation
Source Title
Additional URLs
ISSN
Collection
Abstract
Background: Research on the possible association between shiftwork and breast cancer is complicated because there are many different shiftwork factors, which might be involved including: light at night, phase shift, sleep disruption and changes in lifestyle factors while on shiftwork (diet, physical activity, alcohol intake and low sun exposure).Methods: We conducted a population-based case–control study in Western Australia from 2009 to 2011 with 1205 incident breast cancer cases and 1789 frequency age-matched controls. A self-administered questionnaire was used to collect demographic, reproductive, and lifestyle factors and lifetime occupational history and a telephone interview was used to obtain further details about the shiftwork factors listed above.Results: A small increase in risk was suggested for those ever doing the graveyard shift (work between midnight and 0500 hours) and breast cancer (odds ratio (OR)¼1.16, 95% confidence interval (CI)¼0.97–1.39). For phase shift, we found a 22% increase in breast cancer risk (OR¼1.22, 95% CI¼1.01–1.47) with a statistically significant dose–response relationship (P¼0.04). For the other shiftwork factors, risks were marginally elevated and not statistically significant. Conclusion: We found some evidence that some of the factors involved in shiftwork may be associated with breast cancer but the ORs were low and there were inconsistencies in duration and dose–response relationships.
Related items
Showing items related by title, author, creator and subject.
-
Walasa, W.; Carey, R.; Si, S.; Fritschi, Lin; Heyworth, J.; Fernandez, R.; Boyle, T. (2018)OBJECTIVE: Research indicates that shiftwork may be associated with increased risks of adverse health outcomes, including some cancers. However, the evidence of an association between shiftwork and colorectal cancer risk ...
-
Fernandez, R.; Peters, S.; Carey, Renee; Davies, M.; Fritschi, Lin (2014)Objective. To develop a job-exposure matrix (JEM) that estimates exposure to eight variables representing different aspects of shiftwork among female workers. Methods. Occupational history and shiftwork exposure data were ...
-
Lizama, N.; Rogers, P.; Thomson, Allyson; Slevin, Terry; Fritschi, L.; Saunders, C.; Heyworth, J. (2015)Objective: Our study sought to ascertain women's beliefs about breast cancer risk factors and whether these beliefs differed by demographic factors and personal and family history of breast cancer. Methods: Participants ...